Cross-section measurement and spin parity analysis of the reaction gamma gamma ---> omega rho

Behrend, H.J.; Criegee, L.; Field, J.H.; Franke, G.; Jung, H.; Meyer, J.; Podobrin, O.; Schroder, V.; Winter, G.G.; Bussey, P.J.

doi:10.1016/0370-2693(91)91928-O

Cross-section measurement and spin parity analysis of the reaction gamma gamma ---> omega rho

CELLO

Collaboration

•

H.J. Behrend
(
- DESY
)

Nov, 1990

9 pages

Published in:

Phys.Lett.B 257 (1991) 505-513

Published: 1991

DOI:

10.1016/0370-2693(91)91928-O

Report number:

DESY-90-137

View in:

ADS Abstract Service

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Abstract: (Elsevier)

We present results of an analysis of the reaction γγ → ωϱ in the two-photon process e + e − → ϵ + e − 2 π + 2 π − π 0 in the untagged mode. The cross section is largely compatible with previous determinations; however, we do not confirm the enhancement claimed at 1.9 GeV. All observed ω's are accompanied by ϱ's in the recoiling ππ spectrum. An angular correlation analysis shows that the data is not dominated by a single spin-parity state, thus establishing severe constraints on qq q q models which predict J P = 2 + .

electron positron: colliding beams
colliding beams: electron positron
exchange: two-photon
two-photon: exchange
photon photon: exclusive reaction
omega(783): electroproduction
electroproduction: omega(783)
rho(770): electroproduction
electroproduction: rho(770)
vector meson: pair production

References(37)

Figures(0)

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